Watch Charli XCX Debut New Song, Perform With Taylor Swift

Tonight was the opening show of Taylor Swift’s Reputation Tour. Joining Swift as promised at the Glendale, Arizona show was Charli XCX, who debuted a new track during her set. It’s reportedly called “5 in the Morning.” “This is a brand new song,” Charli told the crowd. “I’ve never played it before, ever.”